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In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.

### Development of the concept

### Pre-Newtonian concepts

### Newtonian mechanics

### Special theory of relativity

### Descriptions

### Fundamental forces

### Non-fundamental forces

### Rotations and torque

### Kinematic integrals

### Potential energy

### Units of measurement

### Force measurement